TY - GEN
T1 - Diversity of N2-fixing cyanobacteria in organic rice field during the cycle of rice crops
AU - Hendrayanti, Dian
AU - Khoiriyah, Istatik
AU - Fadilah, Nurrahmi
AU - Salamah, Andi
N1 - Funding Information:
We express deep gratitude and appreciation to the Directorate of Research and Community Engagement of Universitas Indonesia for The International Publication Research Grant 2017 to A.S (Contract No.617/UN2.R3.1/HKP.05.00/2017). We also thank the Laboratory of Bioimaging and Instruments as well as Plant Taxonomy Laboratory of Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Indonesia for the facilities.
Publisher Copyright:
© 2018 Author(s).
PY - 2018/8/15
Y1 - 2018/8/15
N2 - N2-fixing cyanobacteria are one of the microorganisms that hold a role in the cycles of nitrogen in a rice field. The existence of free-living N2-fixing cyanobacteria in paddy fields provides advantages for rice crop. The diversity of N2-fixing cyanobacteria has been extensively studied in the conventional rice field, while so far, there is no record of cyanobacterial occurrence at organic rice field. At present, implementation of organic rice-system has been increasing. Organic rice field is promoted as an alternative way of keeping the health of paddy field. From that point of view, investigation of N2-fixing cyanobacteria as a part of soil components is important. This study investigated the diversity of the filamentous N2-fixing cyanobacteria assemblage in the organic rice field during the cycle of rice crops (from Dec 2016 to July 2017; approximately two crop cycles). Soil samples were collected from four plots of 20 ha rice field. At each plot, sample soils from three random stations were taken using 3 cm diameter plastic cylinder and mixed to composite soil samples. The result showed that the number of species was low at the beginning and the harvest time of rice plantation (10 and 11, respectively). The number of species reached a peak at the panicle initiation (20 species). Three species were always found at all stages of rice crop's cycle: Nostoc punctiforme, Nostoc muscorum, and Anabaena fertilissima. Genus Nostoc was dominant followed by Anabaena, Calothrix, Cylindrospermum, Nodularia, Scytonema, Trichormus, and Stigonema.
AB - N2-fixing cyanobacteria are one of the microorganisms that hold a role in the cycles of nitrogen in a rice field. The existence of free-living N2-fixing cyanobacteria in paddy fields provides advantages for rice crop. The diversity of N2-fixing cyanobacteria has been extensively studied in the conventional rice field, while so far, there is no record of cyanobacterial occurrence at organic rice field. At present, implementation of organic rice-system has been increasing. Organic rice field is promoted as an alternative way of keeping the health of paddy field. From that point of view, investigation of N2-fixing cyanobacteria as a part of soil components is important. This study investigated the diversity of the filamentous N2-fixing cyanobacteria assemblage in the organic rice field during the cycle of rice crops (from Dec 2016 to July 2017; approximately two crop cycles). Soil samples were collected from four plots of 20 ha rice field. At each plot, sample soils from three random stations were taken using 3 cm diameter plastic cylinder and mixed to composite soil samples. The result showed that the number of species was low at the beginning and the harvest time of rice plantation (10 and 11, respectively). The number of species reached a peak at the panicle initiation (20 species). Three species were always found at all stages of rice crop's cycle: Nostoc punctiforme, Nostoc muscorum, and Anabaena fertilissima. Genus Nostoc was dominant followed by Anabaena, Calothrix, Cylindrospermum, Nodularia, Scytonema, Trichormus, and Stigonema.
KW - cyanobacteria
KW - diversity
KW - nitrogen
KW - organic rice field
UR - http://www.scopus.com/inward/record.url?scp=85052386093&partnerID=8YFLogxK
U2 - 10.1063/1.5050107
DO - 10.1063/1.5050107
M3 - Conference contribution
AN - SCOPUS:85052386093
SN - 9780735417182
T3 - AIP Conference Proceedings
BT - Inventing Prosperous Future through Biological Research and Tropical Biodiversity Management
A2 - Rohmah, Zuliyati
A2 - Hidayati, Lisna
A2 - Arisuryanti, Tuty
A2 - Maryani, null
A2 - Aristya, Ganies Riza
PB - American Institute of Physics Inc.
T2 - 5th International Conference on Biological Science: Inventing Prosperous Future through Biological Research and Tropical Biodiversity Management, ICBS 2017
Y2 - 15 September 2017 through 16 September 2017
ER -